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331 lines
11 KiB
331 lines
11 KiB
/*
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* Copyright (c) Jan Pochyla, SatoshiLabs
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*
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* Licensed under TREZOR License
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* see LICENSE file for details
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*/
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#include STM32_HAL_H
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#include "common.h"
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#include "usb.h"
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#include "usbd_core.h"
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#define UNCONST(X) ((uint8_t *)(X))
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#define USB_MAX_CONFIG_DESC_SIZE 256
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#define USB_MAX_STR_SIZE 62
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#define USB_MAX_STR_DESC_SIZE (USB_MAX_STR_SIZE * 2 + 2)
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#if defined(USE_USB_FS)
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#define USB_PHY_ID USB_PHY_FS_ID
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#elif defined(USE_USB_HS) && defined(USE_USB_HS_IN_FS)
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#define USB_PHY_ID USB_PHY_HS_ID
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#else
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#error Unable to determine proper USB_PHY_ID to use
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#endif
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static usb_device_descriptor_t usb_dev_desc;
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// Config descriptor
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static uint8_t usb_config_buf[USB_MAX_CONFIG_DESC_SIZE] __attribute__((aligned(4)));
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static usb_config_descriptor_t *usb_config_desc = (usb_config_descriptor_t *)(usb_config_buf);
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static usb_interface_descriptor_t *usb_next_iface_desc;
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// String descriptor
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static uint8_t usb_str_buf[USB_MAX_STR_DESC_SIZE] __attribute__((aligned(4)));
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static usb_dev_string_table_t usb_str_table;
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static usb_iface_t usb_ifaces[USBD_MAX_NUM_INTERFACES];
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static USBD_HandleTypeDef usb_dev_handle;
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static const USBD_DescriptorsTypeDef usb_descriptors;
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static const USBD_ClassTypeDef usb_class;
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static secbool __wur check_desc_str(const uint8_t *s) {
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if (NULL == s) return secfalse;
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if (strlen((const char *)s) > USB_MAX_STR_SIZE) return secfalse;
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return sectrue;
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}
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void usb_init(const usb_dev_info_t *dev_info) {
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// Device descriptor
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usb_dev_desc.bLength = sizeof(usb_device_descriptor_t);
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usb_dev_desc.bDescriptorType = USB_DESC_TYPE_DEVICE;
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usb_dev_desc.bcdUSB = 0x0200;
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usb_dev_desc.bDeviceClass = 0xef; // Composite Device Class
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usb_dev_desc.bDeviceSubClass = 0x02; // Common Class
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usb_dev_desc.bDeviceProtocol = 0x01; // Interface Association Descriptor
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usb_dev_desc.bMaxPacketSize0 = USB_MAX_EP0_SIZE;
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usb_dev_desc.idVendor = dev_info->vendor_id;
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usb_dev_desc.idProduct = dev_info->product_id;
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usb_dev_desc.bcdDevice = dev_info->release_num;
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usb_dev_desc.iManufacturer = USBD_IDX_MFC_STR; // Index of manufacturer string
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usb_dev_desc.iProduct = USBD_IDX_PRODUCT_STR; // Index of product string
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usb_dev_desc.iSerialNumber = USBD_IDX_SERIAL_STR; // Index of serial number string
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usb_dev_desc.bNumConfigurations = 1;
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// String table
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ensure(check_desc_str(dev_info->manufacturer), NULL);
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ensure(check_desc_str(dev_info->product), NULL);
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ensure(check_desc_str(dev_info->serial_number), NULL);
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usb_str_table.manufacturer = dev_info->manufacturer;
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usb_str_table.product = dev_info->product;
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usb_str_table.serial_number = dev_info->serial_number;
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// Configuration descriptor
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usb_config_desc->bLength = sizeof(usb_config_descriptor_t);
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usb_config_desc->bDescriptorType = USB_DESC_TYPE_CONFIGURATION;
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usb_config_desc->wTotalLength = sizeof(usb_config_descriptor_t);
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usb_config_desc->bNumInterfaces = 0;
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usb_config_desc->bConfigurationValue = 0x01;
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usb_config_desc->iConfiguration = 0;
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usb_config_desc->bmAttributes = 0x80; // 0x80 = bus powered; 0xc0 = self powered
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usb_config_desc->bMaxPower = 0xfa; // Maximum Power Consumption in 2mA units
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// Pointer to interface descriptor data
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usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
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ensure(sectrue * (USBD_OK == USBD_Init(&usb_dev_handle, (USBD_DescriptorsTypeDef*)&usb_descriptors, USB_PHY_ID)), NULL);
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ensure(sectrue * (USBD_OK == USBD_RegisterClass(&usb_dev_handle, (USBD_ClassTypeDef*)&usb_class)), NULL);
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}
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void usb_deinit(void) {
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USBD_DeInit(&usb_dev_handle);
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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usb_ifaces[i].type = USB_IFACE_TYPE_DISABLED;
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}
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}
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void usb_start(void) {
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USBD_Start(&usb_dev_handle);
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}
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void usb_stop(void) {
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USBD_Stop(&usb_dev_handle);
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}
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/*
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* Utility functions for USB interfaces
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*/
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static usb_iface_t *usb_get_iface(uint8_t iface_num) {
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if (iface_num < USBD_MAX_NUM_INTERFACES) {
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return &usb_ifaces[iface_num];
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} else {
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return NULL; // Invalid interface number
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}
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}
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static void *usb_desc_alloc_iface(size_t desc_len) {
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if (usb_config_desc->wTotalLength + desc_len < USB_MAX_CONFIG_DESC_SIZE) {
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return usb_next_iface_desc;
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} else {
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return NULL; // Not enough space in the descriptor
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}
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}
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static void usb_desc_add_iface(size_t desc_len) {
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usb_config_desc->bNumInterfaces++;
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usb_config_desc->wTotalLength += desc_len;
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usb_next_iface_desc = (usb_interface_descriptor_t *)(usb_config_buf + usb_config_desc->wTotalLength);
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}
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static uint8_t usb_ep_set_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
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PCD_HandleTypeDef *hpcd = dev->pData;
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USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
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USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_SNAK;
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return USBD_OK;
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}
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static uint8_t usb_ep_clear_nak(USBD_HandleTypeDef *dev, uint8_t ep_num) {
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PCD_HandleTypeDef *hpcd = dev->pData;
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USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
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USBx_OUTEP(ep_num)->DOEPCTL |= USB_OTG_DOEPCTL_CNAK;
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return USBD_OK;
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}
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/*
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* USB interface implementations
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*/
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#include "usb_hid-impl.h"
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#include "usb_vcp-impl.h"
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/*
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* USB configuration (device & string descriptors)
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*/
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static uint8_t *usb_get_dev_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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*length = sizeof(usb_dev_desc);
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return (uint8_t *)(&usb_dev_desc);
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}
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static uint8_t *usb_get_langid_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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static const usb_langid_descriptor_t usb_langid_str_desc = {
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.bLength = USB_LEN_LANGID_STR_DESC,
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.bDescriptorType = USB_DESC_TYPE_STRING,
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.wData = USB_LANGID_ENGLISH_US,
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};
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*length = sizeof(usb_langid_str_desc);
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return (uint8_t *)(&usb_langid_str_desc);
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}
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static uint8_t *usb_get_manufacturer_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(UNCONST(usb_str_table.manufacturer), usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_product_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(UNCONST(usb_str_table.product), usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_serial_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(UNCONST(usb_str_table.serial_number), usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_config_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(UNCONST(""), usb_str_buf, length);
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return usb_str_buf;
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}
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static uint8_t *usb_get_interface_str_descriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
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USBD_GetString(UNCONST(""), usb_str_buf, length);
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return usb_str_buf;
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}
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static const USBD_DescriptorsTypeDef usb_descriptors = {
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.GetDeviceDescriptor = usb_get_dev_descriptor,
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.GetLangIDStrDescriptor = usb_get_langid_str_descriptor,
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.GetManufacturerStrDescriptor = usb_get_manufacturer_str_descriptor,
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.GetProductStrDescriptor = usb_get_product_str_descriptor,
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.GetSerialStrDescriptor = usb_get_serial_str_descriptor,
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.GetConfigurationStrDescriptor = usb_get_config_str_descriptor,
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.GetInterfaceStrDescriptor = usb_get_interface_str_descriptor,
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};
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/*
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* USB class (interface dispatch, configuration descriptor)
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*/
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static uint8_t usb_class_init(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_init(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_init(dev, &usb_ifaces[i].vcp, cfg_idx);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_deinit(USBD_HandleTypeDef *dev, uint8_t cfg_idx) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_deinit(dev, &usb_ifaces[i].hid, cfg_idx);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_deinit(dev, &usb_ifaces[i].vcp, cfg_idx);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_setup(USBD_HandleTypeDef *dev, USBD_SetupReqTypedef *req) {
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if (((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_CLASS) &&
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((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_STANDARD)) {
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return USBD_OK;
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}
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if (req->wIndex >= USBD_MAX_NUM_INTERFACES) {
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return USBD_FAIL;
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}
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switch (usb_ifaces[req->wIndex].type) {
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case USB_IFACE_TYPE_HID:
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return usb_hid_class_setup(dev, &usb_ifaces[req->wIndex].hid, req);
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case USB_IFACE_TYPE_VCP:
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return usb_vcp_class_setup(dev, &usb_ifaces[req->wIndex].vcp, req);
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default:
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return USBD_FAIL;
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}
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}
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static uint8_t usb_class_data_in(USBD_HandleTypeDef *dev, uint8_t ep_num) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_data_in(dev, &usb_ifaces[i].hid, ep_num);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_data_in(dev, &usb_ifaces[i].vcp, ep_num);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_data_out(USBD_HandleTypeDef *dev, uint8_t ep_num) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_HID:
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usb_hid_class_data_out(dev, &usb_ifaces[i].hid, ep_num);
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break;
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_data_out(dev, &usb_ifaces[i].vcp, ep_num);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t usb_class_sof(USBD_HandleTypeDef *dev) {
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for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
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switch (usb_ifaces[i].type) {
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case USB_IFACE_TYPE_VCP:
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usb_vcp_class_sof(dev, &usb_ifaces[i].vcp);
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break;
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default:
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break;
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}
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}
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return USBD_OK;
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}
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static uint8_t *usb_class_get_cfg_desc(uint16_t *length) {
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*length = usb_config_desc->wTotalLength;
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return usb_config_buf;
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}
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static const USBD_ClassTypeDef usb_class = {
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.Init = usb_class_init,
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.DeInit = usb_class_deinit,
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.Setup = usb_class_setup,
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.EP0_TxSent = NULL,
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.EP0_RxReady = NULL,
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.DataIn = usb_class_data_in,
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.DataOut = usb_class_data_out,
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.SOF = usb_class_sof,
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.IsoINIncomplete = NULL,
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.IsoOUTIncomplete = NULL,
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.GetHSConfigDescriptor = usb_class_get_cfg_desc,
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.GetFSConfigDescriptor = usb_class_get_cfg_desc,
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.GetOtherSpeedConfigDescriptor = usb_class_get_cfg_desc,
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.GetDeviceQualifierDescriptor = NULL,
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};
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